// 1.介绍Swift 语言@H_403_5@
//再也不用加 ;@H_403_5@
@H_403_5@
// 2.变量 、 常量@H_403_5@
//变量@H_403_5@
var name1 = "你好" //可以自动甄别出 变量的类型@H_403_5@
var age1 = 23@H_403_5@
var weight1 = 55.0@H_403_5@
var isBool = true@H_403_5@
@H_403_5@
@H_403_5@
//常量@H_403_5@
let PI = 3.14159@H_403_5@
let name2 = "请坐"@H_403_5@
@H_403_5@
let 猪 = "@H_403_5@